You need JavaScript to view this

Theoretical and experimental investigation of a high-temperature latent heat storage system with a salt ceramic composite as storage medium; Theoretische und experimentelle Untersuchung eines Hochtemperatur-Salz-Keramik-Latentwaermespeichers

Thesis/Dissertation:

Abstract

In this paper a theoretical and experimental investigation of the transient thermal behavior of a heat storage system is presented. A composite salt/ceramic material is employed as a Thermal Energy Storage (TES) medium with the aim to recover industrial waste heat. The TES medium consists of a solid micro-porous structure of a ceramic matrix, the pores of which are filled with salt. The salt undergoes a phase change at the melting temperature or over a temperature interval, where its latent heat is stored or released. The sensible heat of both the ceramic matrix and the salt can be utilized in a wide temperature range, depending on the specific operating conditions of the store. The molten salt is retained within the pores of the ceramic matrix by capillary forces, which makes the direct-contact heat exchange between the TES medium and the Heat Transfer Fluid (HTF) possible. The theoretical investigation of the TES system is based on a numerical approach. The energy conservation equation for the TES medium is expressed three-dimensional in rectangular coordinates, to take into account the effects of heat losses to the surroundings and the local variation of the HTF inlet boundary conditions. The equation is formulated with the  More>>
Authors:
Publication Date:
Aug 01, 1994
Product Type:
Thesis/Dissertation
Report Number:
IKE-5-240
Reference Number:
SCA: 142000; 250600; PA: DE-95:0G0553; EDB-95:028016; SN: 95001321365
Resource Relation:
Other Information: TH: Diss. (Dr.-Ing.); PBD: Aug 1994
Subject:
14 SOLAR ENERGY; 25 ENERGY STORAGE; THERMAL ENERGY STORAGE EQUIPMENT; LATENT HEAT STORAGE; COMPUTER CALCULATIONS; EQUATIONS; FUNCTIONAL MODELS; TESTING; DESIGN; HEAT TRANSFER FLUIDS; TEMPERATURE DISTRIBUTION; 142000; 250600; HEAT STORAGE; THERMAL
OSTI ID:
10114355
Research Organizations:
Stuttgart Univ. (Germany). Inst. fuer Kernenergetik und Energiesysteme
Country of Origin:
Germany
Language:
German
Other Identifying Numbers:
Other: ON: DE95738270; TRN: DE95G0553
Availability:
OSTI; NTIS (US Sales Only)
Submitting Site:
DE
Size:
98 p.
Announcement Date:
Jun 30, 2005

Thesis/Dissertation:

Citation Formats

Kim, Soo Kyung. Theoretical and experimental investigation of a high-temperature latent heat storage system with a salt ceramic composite as storage medium; Theoretische und experimentelle Untersuchung eines Hochtemperatur-Salz-Keramik-Latentwaermespeichers. Germany: N. p., 1994. Web.
Kim, Soo Kyung. Theoretical and experimental investigation of a high-temperature latent heat storage system with a salt ceramic composite as storage medium; Theoretische und experimentelle Untersuchung eines Hochtemperatur-Salz-Keramik-Latentwaermespeichers. Germany.
Kim, Soo Kyung. 1994. "Theoretical and experimental investigation of a high-temperature latent heat storage system with a salt ceramic composite as storage medium; Theoretische und experimentelle Untersuchung eines Hochtemperatur-Salz-Keramik-Latentwaermespeichers." Germany.
@misc{etde_10114355,
title = {Theoretical and experimental investigation of a high-temperature latent heat storage system with a salt ceramic composite as storage medium; Theoretische und experimentelle Untersuchung eines Hochtemperatur-Salz-Keramik-Latentwaermespeichers}
author = {Kim, Soo Kyung}
abstractNote = {In this paper a theoretical and experimental investigation of the transient thermal behavior of a heat storage system is presented. A composite salt/ceramic material is employed as a Thermal Energy Storage (TES) medium with the aim to recover industrial waste heat. The TES medium consists of a solid micro-porous structure of a ceramic matrix, the pores of which are filled with salt. The salt undergoes a phase change at the melting temperature or over a temperature interval, where its latent heat is stored or released. The sensible heat of both the ceramic matrix and the salt can be utilized in a wide temperature range, depending on the specific operating conditions of the store. The molten salt is retained within the pores of the ceramic matrix by capillary forces, which makes the direct-contact heat exchange between the TES medium and the Heat Transfer Fluid (HTF) possible. The theoretical investigation of the TES system is based on a numerical approach. The energy conservation equation for the TES medium is expressed three-dimensional in rectangular coordinates, to take into account the effects of heat losses to the surroundings and the local variation of the HTF inlet boundary conditions. The equation is formulated with the enthalpy method. For better accounting of the real case, the energy equation for the storage container wall is also considered. The energy equations are discretized by the control volume method and the resulting difference equations are solved by an explicit finite difference method applying the Heun`s predictor-corrector method. For modelling the storage unit, lumped elements interacting with the HTF and also shape factors and lumped heat transfer coefficients are introduced. Because of the nonlinearity of the equations due to the temperature dependent thermophysical properties, an interactive scheme is used for the solution. (orig.)}
place = {Germany}
year = {1994}
month = {Aug}
}